221444531416 has 8 divisors (see below), whose sum is σ = 415208496420. Its totient is φ = 110722265704.

The previous prime is 221444531377. The next prime is 221444531423. The reversal of 221444531416 is 614135444122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13840283206 + ... + 13840283221.

Almost surely, 2^221444531416 is an apocalyptic number.

It is an amenable number.

221444531416 is a deficient number, since it is larger than the sum of its proper divisors (193763965004).

221444531416 is a wasteful number, since it uses less digits than its factorization.

221444531416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27680566433 (or 27680566429 counting only the distinct ones).

The product of its digits is 92160, while the sum is 37.

Adding to 221444531416 its reverse (614135444122), we get a palindrome (835579975538).

The spelling of 221444531416 in words is "two hundred twenty-one billion, four hundred forty-four million, five hundred thirty-one thousand, four hundred sixteen".